Cable connectors
EMV cable connectors
High-quality EMC cable glands from WISKA and Lapp
If current-carrying or signal-carrying cables are routed through a housing wall, a gap in the EMC shielding develops. To ensure that the function of electrical devices is not impaired by electromagnetic waves, the EMC cable glands from WISKA and Lapp, which are often made of brass, are consumers’ first choice. Thanks to the well thought-out design, the cable shielding can be contacted when the cable enters the housing. We stock EMC cable glands with metric threads up to a size of M75, as well as EMC cable glands in the common PG sizes.
What is an EMC cable gland?
An EMC cable gland is often made of nickel-plated brass and is used wherever the RF attenuation properties of shielded enclosures are impaired by a borehole. EMC cable glands are of great importance with regard to the reduction of electromagnetic interference.
Thanks to its special design, an EMC cable gland diverts electromagnetic waves via the surface of the housing and thereby protects sensitive electronic components from damage. By definition, the EMC cable gland uses the Faraday principle. The requirements for these cable glands are application-specific and defined, among other things, in the standard DIN EN 62444 (VDE 0619:2014-05).
What types of EMC cable glands are there and where are they used?
Depending on the design, EMC cable glands made of stainless steel or brass provide high attenuation in different frequency ranges. In addition to conventional EMC cable glands, there are also EMC-Ex variants that are used on electrical equipment in potentially explosive atmospheres and thus meet the requirements of DIN EN 60079. Usually, the EMC cable gland is made of nickel-plated brass, but the plastic version is also being used more and more, e.g. the MagikNUT system from WISKA with a special EMC locking nut.
How is an EMC cable gland connected and what properties does it have?
Depending on which manufacturer the EMC cable gland comes from, the installation also differs. Basically, the connection is established using the following steps:
- Remove the insulation of the cable and expose the shielding braid
- Insert the cable through the union nut of the EMC cable gland and then into the clamp insert
- Route or place the shielding over the clamp insert of the EMC cable gland.
- Now insert the clamp insert into the intermediate connection piece of the cable gland and then mount the connector.
Depending on which EMC cable gland is used, the installation method described here may differ, which is why we recommend taking a look at the assembly instructions.
What thread sizes are available for EMC cable glands?
We stock high-quality cable glands from WISKA and LAPP. In addition to variants in PG sizes, our range of EMC cable glands includes the following metric dimensions:
- EMC M16 cable gland
- EMC M20 cable gland
- EMC M25 cable gland
- EMC M32 cable gland
- EMC M40 cable gland
- EMC M50 cable gland
- EMC M63 cable gland
- EMC M75 cable gland
Which PG sizes are available for EMC cable glands?
The PG glands with armoured thread which were formerly common in German-speaking countries (PG thread according to the old standard DIN EN 46430) are now only permitted in exceptional cases and are usually replaced by metric glands (DIN EN 60423). Nevertheless, the WISKA and Lapp range includes EMC cable glands in common PG sizes.
Available EMC cable glands in PG sizes and their metric equivalents:
- EMC PG 7 cable gland corresponds to M12 x 1.5
- EMC PG 9 cable gland corresponds to M16 x 1.5
- EMC PG 11 cable gland corresponds to M20 x 1.5
- EMC PG 16 cable gland corresponds to M25 x 1.5
- EMC PG 21 cable gland corresponds to M32 x 1.5
- EMC PG 36 cable gland corresponds to M40 x 1.5
- EMC PG 42 cable gland corresponds to M50 x 1.5
- EMC PG 48 cable gland corresponds to M63 x 1.5